Air conditioning process is a technique that can be used to adjust preferable condition of air temperature in a room so an appropriate condition can be achieved. Cooling pocess is a room can be identified as a transferring process of heat from that room into other places. This absorbing or transferring process is not as casy as the process of interesting the heat into the room. In absorbing process of the heat, it is necessary to use certain equipment and careful activities, particularly in choosing the right devices and planning activities choosing cooling procedures. Those device must be really determinated by several factors such as the quantity of the absorbed heat, duration and capacity of utilized devices.

Capacity of a pump is the fundamental data used in selecting certain pump. The flowing speed of the pump is very useful to determine the pumps capacity for irrigating process. This capacity must fulfill utilizing requirements which focus on two main criteria : 1) total capacity of pumps must provide maximum necessity (necessity on the highest point), 2) those pumps must be able to work efficiently and continously in the fluctuating condition. In order to fulfill the two criteria above it is necessary to use two ore more pumps with same capacity.

If the work piece that turning very long is so whenever done by the turning machine the guy wire because crosscut style effect of crosscut chisel will generate deflexed at the work piece cause the vibration at the time of cutting process so that surface of result process bubut become harshly. To avoid that usually used the supported. On the contrary usage of supporter economically is addition of the appliance and workmanship causing at addition of production cost in industrial scale. This research wish to be known maximum limit object overhang work without using supporter of flash light turn around at lathe process. Object length work at this research reprecentaced with the length dibubut per diameter (L/D). Object examinee diameter is Ø 20 with ratio length/diameter the object turning is: 1:1, 1,5:1, 2:1, 2,5:1, 3:1, 3,5:1, 4:1. From analysis use the method test T concluded that the work piece over hang give influence of surface roughness significant otherwise used unsupported is L/D ≥ 3.

This study focused on the manufacture of grain drying equipment was needed by farmers. Much research has been done by previous researchers about how to drain the rice in a relatively short time. And already there are many methods and tools of research that has been done including changing the form of construction, replacing the material in order to produce a good quality grain drying. In this paper, the authors conducted a study on how to make grain dryers and do research drying system. This research looks at how adaptable it’s in drying grain. The method I use is the reset method by comparing the natural drying and drying device made. Research using laboratory test equipment such as Airflow, digital scales and thermometers. Test data taken (values drought grain) using measurement methods directly on objects. Test data was analyzed using Microsoft Excel software. The results of processing these data it is concluded that the optimum conditions for drying grain with it’s that are made are in position 1, the air temperature is 420C grain drying, grain flow rate 0.1 Lt / dt, hot air flow rate 0.68 m / dt, grain drying value 1060 gr/lt.

Wind turbines convert the kinetic energy in wind into clean electricity. When the wind spins the wind turbines
blades, a rotor captures the kinetic energy of the wind and converts it into rotary motion to drive the generator.
Wind electric systems are one of the most cost-effective home-based renewable energy systems with zero
emissions and pollution. Many factors that influence the performance of wind turbines such as wind speed,
blade shape, and number of blades. In Generator, Coil number of turn (N) also influence performance of wind
turbine. Manufacture of wind turbine prototype as a learning medium to facilitate students in understanding the
concept of wind electric system. Results of the test prototype wind turbine if the wind speed the greater the
resulting voltage will be higher, the Coil number of turn (N) also affects the voltage generated.

Forging is a metal processing with state of deformation in the heat with a blow system. Some of the products produced by the industry wrought blacksmith like machetes, knives, hoes, Dodos, tools, household, agricultural, and equipment for agriculture and plantations. In general, the blacksmith business production is very limited and do not meet all the required quality standards, it is constrained in the process of forging forging products are still done manually with hammer blows repeatedly driven by hand. The purpose of this research is the design of machinery forging hammer spring system that works mechanically. With this engine the forging process becomes easier, production and product quality small blacksmith forging industry can be improved. From the results of the activities that have been implemented resulting machine forging hammer spring system with a size of 1.9 x 0.9 x 0.9 (m) by using a hammer tap mechanically driven by electric motors. The resulting machine uses 2 HP electric motor, using a flywheel as an addition to the pressure at the hammer presses the workpiece, and the clutch as successor breaker round, and spring hammer spring as conductor of the pressure fluctuation. So the use of the components of the flywheel and this springs capability of forging machine in one hit can reduce the depth of the workpiece to 2-3 mm, and the resulting number of strokes Â± 200-250 blows / min.